San Francisco ? Yahoo Inc.’s Web site is unveiling a new look today as the Internet powerhouse strives to remain the world’s most popular online destination and strengthen its advertising appeal.

The overhaul marks the first face-lift to Yahoo’s home page since September 2004.

The redesigned page, initially available in the United States and Europe at www.yahoo.com/preview, includes more interactive features that reduce the need to click through to other pages to review the weather, check e-mail, listen to music or monitor local traffic conditions.

Another addition, called “Yahoo Pulse,” offers recommendations and insights about cultural trends culled from the Web site’s 402 million users worldwide.

Yahoo is making the upgrade as it battles for traffic with longtime rivals MSN, AOL and Google Inc. while also trying to fend off an intensifying threat posed by the rise of social networking sites such as MySpace.com.

“Our goal is to have the best page on the Internet,” said Dan Rosensweig, Yahoo’s chief operating officer. “We feel like this (redesign) does something great for everybody.”

Sunnyvale, Calif.-based Yahoo regards the latest changes as the most dramatic renovations made to its front page since the site’s 1994 debut as a bare-bones directory developed by Stanford University students Jerry Yang and David Filo.

Dan Rosensweig, Yahoo's chief operating officer. holds a copy of their new home page at Yahoo! headquarters in Sunnyvale, Calif., Monday, May 15, 2006. Internet powerhouse Yahoo Inc. unveils the most extensive makeover of its front Web page in a decade, offering 402 million users more interactive features and more information compiled from the activity in other sections of its site.

The new look is long overdue, said Jupiter Research analyst David Card. “The site was getting pretty long in the tooth and looking pretty old-fashioned,” he said. “Now, it looks clean, crisp and modern.”

Even so, Card believes Yahoo’s upgrades won’t impress younger, cutting-edge Web surfers who are spending an increasing amount of time hanging out at MySpace.com. “They didn’t really push the envelope very hard.”

The most notable changes will allow Yahoo users to pull down interactive menus giving them snapshots of weather, traffic and movie information as well as providing instant access to the site’s popular e-mail, instant messaging and music services.

Like other widely visited Web sites, Yahoo must balance its desire to keep pace with the Internet’s constantly shifting trends with the recognition that changing things too dramatically might alienate a large number of users comfortable with the status quo.

Yahoo settled on the final redesign, code-named “Spirit,” after months of testing with selected users. As another precaution, the new look won’t show up as the default page of Yahoo.com for several more months.

“Any time you touch the most visited page on the Internet, it’s going to feel like a big change and we think this is a really big change,” Rosensweig said.